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Log Reference

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of logs on the product.
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ALML/4/HSB_SWITCH_CAUSE:[STRING1] causes MPU board[ULONG] to reset. Switch cause code: [STRING2].


This log records reset information of the active MPU.


Parameter Name Parameter Meaning
[STRING1] Cause description of active/standby switchover. The specific causes are as follows:
  • Unknown switch reason: unknown reason.
  • VRP command force: forced reset through command line.
  • Master MPU is no memory: The active MPU has insufficient memory.
  • VRP find task deadloop: task infinite loop.
  • Batch was not over: task abnormal.
  • Master switch to slave Interrupt: Active/standby switchover results in reset of the MPU.
  • Ecm Channel was faulty: ECM channel failure.
  • Monitor bus communication Interrupt: CANbus communication interrupted
  • MPU board was pulled out: The MPU is removed.
[ULONG] Slot ID of the active MPU
[STRING2] Cause code of active/standby switchover.
  • 0: unknown reason.
  • 1: forced reset through command line.
  • 2: The active MPU has insufficient memory.
  • 3: task infinite loop
  • 4: task abnormal
  • 5: Active/Standby switchover causes the active MPU to reset.
  • 6: ECM channel failure.
  • 7: CANbus communication interrupted
  • 8: The MPU is removed.

Possible Causes

Reason 1:

Forced reset is performed through the command line.

Reason 2:

The active MPU has insufficient memory.

Reason 3:

Task infinite loop occurs.

Reason 4:

A task is abnormal.

Reason 5:

Active/Standby switchover causes the active MPU to reset.

Reason 6:

An ECM channel fails.

Reason 7:

The communication of the CANbus is interrupted.

Reason 8:

The MPU is removed.


  1. Check whether the active MPU is reset for routing maintenance.
    • If so, the alarm handling ends.
    • If not, go to step 2.
  2. Collect log information and configuration information, and then contact technical support personnel.You can collect diagnostic information using the display diagnostic-information command.
Updated: 2019-08-21

Document ID: EDOC1000142069

Views: 575980

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